./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/diamond_1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:31:39,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:31:39,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:31:39,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:31:39,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:31:39,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:31:39,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:31:39,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:31:39,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:31:39,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:31:39,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:31:39,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:31:39,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:31:39,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:31:39,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:31:39,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:31:39,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:31:39,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:31:39,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:31:39,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:31:39,211 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:31:39,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:31:39,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:31:39,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:31:39,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:31:39,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:31:39,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:31:39,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:31:39,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:31:39,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:31:39,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:31:39,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:31:39,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:31:39,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:31:39,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:31:39,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:31:39,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:31:39,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:31:39,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:31:39,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:31:39,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:31:39,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:31:39,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:31:39,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:31:39,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:31:39,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:31:39,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:31:39,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:31:39,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:31:39,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:31:39,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:31:39,255 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:31:39,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:31:39,256 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:31:39,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:31:39,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:31:39,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:31:39,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:31:39,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:31:39,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:31:39,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:31:39,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:31:39,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:31:39,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:31:39,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:31:39,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:31:39,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:31:39,259 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:31:39,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:31:39,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:31:39,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 278330930f6296a6ef523f9a21bb3281878247b5e50b78eb9077d2b7690716c4 [2022-07-13 15:31:39,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:31:39,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:31:39,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:31:39,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:31:39,488 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:31:39,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2022-07-13 15:31:39,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac90cde74/ca57a6ff6c0c4aa4874e4a165c100503/FLAGa8b11a91b [2022-07-13 15:31:39,900 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:31:39,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2022-07-13 15:31:39,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac90cde74/ca57a6ff6c0c4aa4874e4a165c100503/FLAGa8b11a91b [2022-07-13 15:31:39,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac90cde74/ca57a6ff6c0c4aa4874e4a165c100503 [2022-07-13 15:31:39,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:31:39,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:31:39,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:31:39,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:31:39,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:31:39,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:31:39" (1/1) ... [2022-07-13 15:31:39,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59049437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:39, skipping insertion in model container [2022-07-13 15:31:39,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:31:39" (1/1) ... [2022-07-13 15:31:39,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:31:39,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:31:40,045 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2022-07-13 15:31:40,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:31:40,058 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:31:40,065 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2022-07-13 15:31:40,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:31:40,076 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:31:40,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40 WrapperNode [2022-07-13 15:31:40,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:31:40,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:31:40,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:31:40,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:31:40,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,106 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2022-07-13 15:31:40,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:31:40,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:31:40,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:31:40,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:31:40,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:31:40,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:31:40,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:31:40,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:31:40,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (1/1) ... [2022-07-13 15:31:40,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:31:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:40,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:31:40,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:31:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:31:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:31:40,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:31:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:31:40,223 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:31:40,224 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:31:40,290 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:31:40,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:31:40,294 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 15:31:40,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:31:40 BoogieIcfgContainer [2022-07-13 15:31:40,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:31:40,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:31:40,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:31:40,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:31:40,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:31:39" (1/3) ... [2022-07-13 15:31:40,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f4f4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:31:40, skipping insertion in model container [2022-07-13 15:31:40,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:31:40" (2/3) ... [2022-07-13 15:31:40,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f4f4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:31:40, skipping insertion in model container [2022-07-13 15:31:40,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:31:40" (3/3) ... [2022-07-13 15:31:40,308 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2022-07-13 15:31:40,321 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:31:40,321 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:31:40,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:31:40,359 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e44e29e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46ddb523 [2022-07-13 15:31:40,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:31:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-13 15:31:40,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:40,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-13 15:31:40,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-07-13 15:31:40,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:40,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500214467] [2022-07-13 15:31:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500214467] [2022-07-13 15:31:40,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500214467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:31:40,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:31:40,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:31:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834296355] [2022-07-13 15:31:40,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:31:40,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:31:40,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:31:40,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:31:40,512 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:40,522 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-07-13 15:31:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:31:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-13 15:31:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:40,529 INFO L225 Difference]: With dead ends: 20 [2022-07-13 15:31:40,529 INFO L226 Difference]: Without dead ends: 8 [2022-07-13 15:31:40,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:31:40,536 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:40,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:31:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-07-13 15:31:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-07-13 15:31:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-07-13 15:31:40,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-07-13 15:31:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:40,561 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-07-13 15:31:40,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-07-13 15:31:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-13 15:31:40,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:40,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-13 15:31:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:31:40,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:40,563 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-07-13 15:31:40,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:40,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135767921] [2022-07-13 15:31:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:40,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:40,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135767921] [2022-07-13 15:31:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135767921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:31:40,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:31:40,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:31:40,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725688855] [2022-07-13 15:31:40,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:31:40,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:31:40,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:31:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:31:40,669 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:40,699 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-07-13 15:31:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:31:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-13 15:31:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:40,701 INFO L225 Difference]: With dead ends: 14 [2022-07-13 15:31:40,701 INFO L226 Difference]: Without dead ends: 10 [2022-07-13 15:31:40,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:31:40,702 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:40,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:31:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-13 15:31:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-07-13 15:31:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-13 15:31:40,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-13 15:31:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:40,706 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-13 15:31:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-13 15:31:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 15:31:40,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:40,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:40,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:31:40,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2022-07-13 15:31:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216609413] [2022-07-13 15:31:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216609413] [2022-07-13 15:31:40,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216609413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:31:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678375808] [2022-07-13 15:31:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:40,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:40,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:31:40,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:31:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:40,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:31:40,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:31:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:40,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:31:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:40,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678375808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:31:40,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:31:40,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 15:31:40,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778889703] [2022-07-13 15:31:40,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:31:40,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 15:31:40,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 15:31:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:31:40,912 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:40,982 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-07-13 15:31:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:31:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 15:31:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:40,984 INFO L225 Difference]: With dead ends: 21 [2022-07-13 15:31:40,984 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 15:31:40,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:31:40,985 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:40,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:31:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 15:31:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-07-13 15:31:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-07-13 15:31:40,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2022-07-13 15:31:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:40,990 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-07-13 15:31:40,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-07-13 15:31:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 15:31:40,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:40,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:41,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:31:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:41,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 2 times [2022-07-13 15:31:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559393173] [2022-07-13 15:31:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559393173] [2022-07-13 15:31:41,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559393173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:31:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334264767] [2022-07-13 15:31:41,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:31:41,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:41,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:41,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:31:41,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:31:41,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:31:41,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:31:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 15:31:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:31:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:41,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:31:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:41,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334264767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:31:41,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:31:41,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-13 15:31:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154294181] [2022-07-13 15:31:41,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:31:41,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:31:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:31:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:31:41,493 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:41,819 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-07-13 15:31:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:31:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-13 15:31:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:41,820 INFO L225 Difference]: With dead ends: 42 [2022-07-13 15:31:41,820 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 15:31:41,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:31:41,822 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:41,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:31:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 15:31:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-07-13 15:31:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-07-13 15:31:41,828 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2022-07-13 15:31:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:41,828 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-07-13 15:31:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-07-13 15:31:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 15:31:41,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:41,829 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:41,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:31:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 15:31:42,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:42,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1371031502, now seen corresponding path program 1 times [2022-07-13 15:31:42,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121255418] [2022-07-13 15:31:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:42,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 15:31:42,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:42,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121255418] [2022-07-13 15:31:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121255418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:31:42,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:31:42,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:31:42,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190503912] [2022-07-13 15:31:42,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:31:42,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:31:42,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:31:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:31:42,072 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:42,083 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2022-07-13 15:31:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:31:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 15:31:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:42,084 INFO L225 Difference]: With dead ends: 59 [2022-07-13 15:31:42,084 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 15:31:42,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:31:42,085 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:42,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:31:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 15:31:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-07-13 15:31:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-13 15:31:42,092 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 20 [2022-07-13 15:31:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:42,093 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-13 15:31:42,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-13 15:31:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 15:31:42,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:42,094 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 15:31:42,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 1 times [2022-07-13 15:31:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:42,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425726681] [2022-07-13 15:31:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:42,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:42,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425726681] [2022-07-13 15:31:42,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425726681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:31:42,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046825626] [2022-07-13 15:31:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:42,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:31:42,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:31:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:42,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:31:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:31:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:42,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:31:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:42,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046825626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:31:42,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:31:42,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-13 15:31:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629918008] [2022-07-13 15:31:42,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:31:42,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 15:31:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 15:31:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-07-13 15:31:42,520 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:43,287 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2022-07-13 15:31:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 15:31:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 15:31:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:43,289 INFO L225 Difference]: With dead ends: 119 [2022-07-13 15:31:43,289 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 15:31:43,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2022-07-13 15:31:43,290 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:43,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:31:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 15:31:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 58. [2022-07-13 15:31:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-13 15:31:43,301 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 20 [2022-07-13 15:31:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:43,301 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-13 15:31:43,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-13 15:31:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:31:43,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:43,302 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:43,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 15:31:43,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:43,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1066218333, now seen corresponding path program 3 times [2022-07-13 15:31:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840122365] [2022-07-13 15:31:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840122365] [2022-07-13 15:31:43,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840122365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:31:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568841817] [2022-07-13 15:31:43,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:31:43,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:43,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:31:43,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:31:43,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 15:31:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:31:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 15:31:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:31:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:43,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:31:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:44,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568841817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:31:44,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:31:44,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 27 [2022-07-13 15:31:44,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742456473] [2022-07-13 15:31:44,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:31:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 15:31:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 15:31:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:31:44,230 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:52,505 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2022-07-13 15:31:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 15:31:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 15:31:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:52,506 INFO L225 Difference]: With dead ends: 124 [2022-07-13 15:31:52,506 INFO L226 Difference]: Without dead ends: 114 [2022-07-13 15:31:52,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=501, Invalid=1059, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 15:31:52,507 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 83 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:52,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 46 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 15:31:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-13 15:31:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2022-07-13 15:31:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 81 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-07-13 15:31:52,518 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 26 [2022-07-13 15:31:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:52,518 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-07-13 15:31:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-07-13 15:31:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:31:52,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:52,519 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:52,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:31:52,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:52,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash 771836189, now seen corresponding path program 2 times [2022-07-13 15:31:52,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:52,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866604661] [2022-07-13 15:31:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:52,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 15:31:52,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866604661] [2022-07-13 15:31:52,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866604661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:31:52,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:31:52,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:31:52,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431377011] [2022-07-13 15:31:52,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:31:52,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:31:52,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:31:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:31:52,760 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:52,773 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-07-13 15:31:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:31:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 15:31:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:52,774 INFO L225 Difference]: With dead ends: 117 [2022-07-13 15:31:52,774 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 15:31:52,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:31:52,776 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:52,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:31:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 15:31:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-07-13 15:31:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-07-13 15:31:52,793 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 26 [2022-07-13 15:31:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:52,793 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-07-13 15:31:52,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-07-13 15:31:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 15:31:52,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:52,797 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:52,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 15:31:52,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 2 times [2022-07-13 15:31:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816296057] [2022-07-13 15:31:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:52,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:53,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816296057] [2022-07-13 15:31:53,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816296057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:31:53,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080227564] [2022-07-13 15:31:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:31:53,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:53,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:31:53,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:31:53,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:31:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:31:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 15:31:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:31:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:53,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:31:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-13 15:31:53,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080227564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:31:53,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:31:53,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 6] total 39 [2022-07-13 15:31:53,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551455104] [2022-07-13 15:31:53,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:31:53,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 15:31:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 15:31:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 15:31:53,664 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:31:54,416 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2022-07-13 15:31:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 15:31:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-13 15:31:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:31:54,417 INFO L225 Difference]: With dead ends: 97 [2022-07-13 15:31:54,417 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 15:31:54,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 15:31:54,418 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:31:54,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:31:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 15:31:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-07-13 15:31:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-07-13 15:31:54,428 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 38 [2022-07-13 15:31:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:31:54,428 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-07-13 15:31:54,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:31:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-07-13 15:31:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 15:31:54,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:31:54,429 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2022-07-13 15:31:54,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:31:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:54,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:31:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:31:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -610250044, now seen corresponding path program 3 times [2022-07-13 15:31:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:31:54,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896094188] [2022-07-13 15:31:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:31:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:31:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:31:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:54,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:31:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896094188] [2022-07-13 15:31:54,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896094188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:31:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656072286] [2022-07-13 15:31:54,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:31:54,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:31:54,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:31:54,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:31:54,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:31:55,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-13 15:31:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:31:55,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 15:31:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:31:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:55,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:31:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:31:55,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656072286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:31:55,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:31:55,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2022-07-13 15:31:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746077904] [2022-07-13 15:31:55,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:31:55,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 15:31:55,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:31:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 15:31:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 15:31:55,662 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:32:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:32:14,115 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2022-07-13 15:32:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 15:32:14,116 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-13 15:32:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:32:14,117 INFO L225 Difference]: With dead ends: 128 [2022-07-13 15:32:14,117 INFO L226 Difference]: Without dead ends: 124 [2022-07-13 15:32:14,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1098, Invalid=1982, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 15:32:14,118 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:32:14,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 15:32:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-13 15:32:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-13 15:32:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:32:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-07-13 15:32:14,131 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 40 [2022-07-13 15:32:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:32:14,132 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-07-13 15:32:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:32:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-07-13 15:32:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 15:32:14,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:32:14,133 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-07-13 15:32:14,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 15:32:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:32:14,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:32:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:32:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1301187105, now seen corresponding path program 4 times [2022-07-13 15:32:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:32:14,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587309257] [2022-07-13 15:32:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:32:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:32:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:32:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:32:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:32:14,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587309257] [2022-07-13 15:32:14,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587309257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:32:14,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102665345] [2022-07-13 15:32:14,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:32:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:32:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:32:14,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:32:14,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:32:14,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:32:14,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:32:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 15:32:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:32:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:32:14,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:32:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:32:15,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102665345] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:32:15,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:32:15,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-13 15:32:15,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650041323] [2022-07-13 15:32:15,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:32:15,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 15:32:15,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:32:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 15:32:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 15:32:15,594 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:33:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:33:28,442 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2022-07-13 15:33:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 15:33:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-13 15:33:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:33:28,443 INFO L225 Difference]: With dead ends: 176 [2022-07-13 15:33:28,443 INFO L226 Difference]: Without dead ends: 172 [2022-07-13 15:33:28,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=1747, Invalid=3222, Unknown=1, NotChecked=0, Total=4970 [2022-07-13 15:33:28,445 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:33:28,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 75 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 15:33:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-13 15:33:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-07-13 15:33:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:33:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-07-13 15:33:28,468 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 50 [2022-07-13 15:33:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:33:28,469 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-07-13 15:33:28,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:33:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-07-13 15:33:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 15:33:28,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:33:28,474 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2022-07-13 15:33:28,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:33:28,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:33:28,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:33:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:33:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1992649728, now seen corresponding path program 4 times [2022-07-13 15:33:28,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:33:28,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36807012] [2022-07-13 15:33:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:33:28,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:33:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:33:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:33:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:33:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36807012] [2022-07-13 15:33:29,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36807012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:33:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604119296] [2022-07-13 15:33:29,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:33:29,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:33:29,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:33:29,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:33:29,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:33:29,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:33:29,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:33:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-13 15:33:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:33:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:33:29,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:33:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:33:31,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604119296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:33:31,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:33:31,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 79 [2022-07-13 15:33:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586757342] [2022-07-13 15:33:31,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:33:31,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-13 15:33:31,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:33:31,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-13 15:33:31,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1675, Invalid=4487, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 15:33:31,697 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)